To clarify, this thread was locked because Particle Person reposted the image here in S&C. PP, please don't do that.
However, I would like to reopen the discussion because I think PP raises a good point. I didn't see anything wrong with the image mister bickles posted (beyond being off-topic in PR&S, which is why I split it to AR). For anyone who didn't see it, it included a cartoon depiction of a woman not wearing a shirt, in which nipples were visible (which appears to be the point of contention).
Now, it might just be that my workplace takes a somewhat lax attitude to these things, but I wouldn't have considered that to be NSFW. I do think we need to revise this rule, and while my preference would be to relax the stipulation so that some amount of tasteful nudity is permitted (at least in CN and AR), I'm open to alternative suggestions if most people would rather not see such things here. One option would be to have a flag that can be set on a per-thread basis which indicates that it may contain NSFW material, and that anyone who does not want to view it should stay away.
So, what level of nudity do people want to accept, and how can we better word this rule?